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Introduction to Linux - A Hands on Guide

This guide was created as an overview of the Linux Operating System, geared toward new users as an exploration tour and getting started guide, with exercises at the end of each chapter.
For more advanced trainees it can be a desktop reference, and a collection of the base knowledge needed to proceed with system and network administration. This book contains many real life examples derived from the author's experience as a Linux system and network administrator, trainer and consultant. They hope these examples will help you to get a better understanding of the Linux system and that you feel encouraged to try out things on your own.

I am working on a project testing out openMosix. For those that don't know what that is, it is a distributed OS patch that allows you to add nodes to your cluster and it will handle distributing processes. I want to write a program that will consume a certain portion of the cpu, or will perform a random bunch of i/o requests so that I can test out openMosix on my system.

I have tried doing the typical things like compiling the kernel to see how openMosix works, but for the project I am tweaking with some of the distributed OS algorithms and seeing if I can improve them. Therefore, I need a program to throw a consistent load at the nodes to duplicate results and compare. Ideally, I want to have a config file that says I want to consume X% of the cpu, or something like that.

My problem is that I don't know how to do this! I am not asking for anyone to write code, just to throw some ideas out there for how to go about starting something like this.

Hm I may be completely wrong here, but I believe this is not how the Linux scheduler
works (may be different with Mosix and/or SMP kernel). You can't control how much CPU
time a certain process will consume, all you can do is assign a certain priority (in relation to
other processes' priority) to it. How much CPU time your process will effectively consume
depends onits priority, total number of processes and their priority in relation to your process.

i havent ever tried this stuff..but yes the man page for setrlimit does tend to suggest that you can tune these values to take a specified by the rlimit structure...if the process suns longer than the time specified as the limit, it receives the signal,SIGXCPU, tho the catch is : this time is in seconds...which I dont think should be that big an issue as the application desired should be doing something that takes a long time...if i got the question..